A volcano that has been silent since about 1550 began erupting after a big quake. A radar satellite recorded its lava spreading, twice every 12 days.

Add Yahoo as a preferred source to see more of our stories on Google. An Earth-observing radar satellite launched jointly between the U.S. and India has returned its first images of our planet's ...

Freely available satellite radar imaging is being used for the first time to help track colonies of endangered emperor penguins in Antarctica throughout the winter months. Typically satellite images ...